Mathematics High School

Solve the equation with the quadratic formula 4k^2-11k-18=0

Answers

Answer 1

Answer:

Step-by-step explanation:

Quadratic formula tells us that the roots are equal to:

[tex]\frac{-b\pm \:\sqrt{b^2-4ac}}{2a}[/tex]

The letters are just the coefficients, so a = 4, b = -11, and c = -18. Plugging these values into the formula we get:

[tex]\frac{-11\pm \sqrt{11^2-4\cdot \:4\left(-18\right)}}{2\cdot \:4}[/tex]

Which when simplified tells us that the roots are:

[tex]\frac{-11+\sqrt{409}}{8}[/tex] or [tex]\frac{-11-\sqrt{409}}{8}[/tex]

Remember the plus or minus sign is what gives us two answers.

Related Questions

rewrite the equation:
0=x^2+4x+1

Answers

Answer:

-x^2-4x-1=0

plz mark as brainliest

Step-by-step explanation:

Answer these two questions for brainiest hurry:)

-10.2 + c = -8.14 solve this equation

also Tell whether -8 is a solution of - j - 7 > -1. Show your work and answer yes or no

Answers

Answer:

C=2.06

Step-by-step explanation:

-8.14+10.2=2.06

Roger jarred 15 liters of jam after 2 days. How much jam did Roger jar if he spent 6 days making jam?

Answers

Answer: 45 liters

Step-by-step explanation:

If Roger jars 15 liters of jam in 2 days, we can divide to see how much liters of jam Roger can jar in 1 day. We can divide 15 by 2 to find how much jam can be jarred in one day.

15 / 2 = 7.5.

Roger can jar 7.5 liters of jam every day.

Now we can multiply 7.5 by 6 to find how much jam Roger can jar at the end of 6 days.

7.5 x 6 = 45.

Therefore, Roger can jar 45 liters of jam in 6 days.

What is the slope of the line that passes through these two points (10, 20) and (13, 30)?Show your work

Answers

Answer:

(y-y1)/(x-x1)=(y2-y1)/x2-x1)

(y-20)/(x-10)=(30-20)/(13-10)

......

now you can easily solve it

Two point form

Hey! So what you do is put 30-20 then subtract 13-10 and from there it should be easy! So you take the second number of the second point and put the second number of the first point and subtract you do the same for the other point

find the prime factors of 16

Answers

Answer:

2 as the others factors has more than 2 factors

Can someone please answer my question Geometric Sequence:
3, 6, 12, 24, …

Answers

Answer:

Step-by-step explanation:

You multiply by 2 each time

I believe it is multiplying by 2 each time.

3 x 2 = 6

6 x 2 = 12

12 x 2 = 24

So if this was true to continue we would just multiply by 2....

24 x 2 = 48

48 x 2 = 96

96 x 2 = 192

192 x 2 = 384

384 x 2 = 768

and continue for as long as you need to go....

Hope this helped!

HELP HELP HELP I NEED TO TURN THEM IN IN 10 MINUTES
1. 3 3/10 + 7 6/10
2. 4 1/3 + 2 1/2
3. 7 3/8 - 5 1/8
4. 16 7/8 - 11 1/4
5. (13 + 2) divided by 5x2 =

Answers

Answer: (1. 10 9/10.) (2. 6 5/6) (3. 2 2/8) (4. 28 1/8) 5. 1.5 or 1 1/2

Step-by-step explanation:

Please answer ASAP i need this immediately

Answers

Answer:

2/3 is less than 1 1/15

Step-by-step explanation:

2/3 * 1 3/5 = 1 1/15

2/3 < 1 1/15

Answer:

Step-by-step explanation:

2 over 3 is less than 1 and 3 over 5

PLEASE I NEED THE ANSWER NOW 11 POINTS FOR CORRECT ANSWER BRAINLIEST TOO

Answers

Answer:

I believe its 3.3m

Step-by-step explanation:

I haven't taken geometry in a few years so sorry if its wrong

2.2/0.3= 7.3

This means that the shadow of the tree is x7.3 bigger than the cat’s shadow.

So you do 0.45x7.3=3.28m (you can round it to 3.3m)

This means the height of the tree is 3.3m!

Find the 18th term of the arithmetic sequence whose common difference is d=5 and whose first term is a = 4.

Answers

Answer:

Step-by-step explanation:

a₁₈ = a₁+(18-1)d = 4+17·5 = 89

Ted is making chocolate chip pancakes for his whole family. He wants to make 20 pancakes using a 3-cup bag of chocolate chips. How many cups of chocolate chips will be in each pancake? Write your answer as a proper fraction or mixed number.

Answers

Answer:

3/20

Step-by-step explanation:

Given: Number of cups of pancakes to be made = 20

Number of bag of chocolate chips available = 3

Therefore, cups of chocolate chips will be in each pancake= 3/20

Sales for a business were 3 million dollars more the second year than the first, and sales for the third year were double the sales for the second year. If sales for the third year were 38 million dollars, what were sales, in millions of dollars, for the first year?

16

17.5

20.5

22

35

Answers

Answer:

16 million

Step-by-step explanation:

see the explanation attached above

Ryan spent 35% of his money on snacks at the concession stand. If he spent $4.20, how much money did he have before buying snacks?

Answers

Answer:

Step-by-step explanation:

i know

Help me i will give brainliest...Have a goodnight

Answers

Answer:

apparently 6 sq in.

Step-by-step explanation:

Question 3 of 10
The triangles shown below must be congruent.
600
60
12
12
2010
61°
O A. True
B. False

Answers

True. The left triangle is the exact same as the right. The only difference is that the right hand triangle is backwards compared to the left triangle. They have the same measures and angles.

Q2. In a camp food was enough for 400 people for 23 days. If 60 more people joined the camp, find the number of days the food will last?

Q3. Given that y is directly proportional to x and that y= 40 when x= 200, find the value of
(a) y when x= 15
(b) x when y= 8

Q4. If y is inversely proportional to x and that y= 8 when x= 30, find the value of:

(a) the value of y when x= 4
(b) the value of x when y= 360

Answers

Answer:

Q2)

We have food for 400 people, and it will last for 23 days.

Then we have an inverse relation, where the number of days decreases as the number of people increases, this means that we have a relationship like:

23 days = K/400 people.

Then we get:

(23 days)*(400 people) = K = 9200 days*people.

Now if we increase the number of people by 60, we get.

people = 460

Then the number of days that this will last is:

D = (9200 days*people)/460 people = 20 days.

The food will last for 20 days.

Q3) We have a proportional relationship (y = k*x) such that y = 40 when x = 200, then we get:

40 = k*200

With this, we can find the value of k

40/200 = k = 0.2

Then the proportional relationship is:

y = 0.2*x

a) We need to replace x by 15.

y = 0.2*15 = 3

y = 3

b) We need to replace y by 8.

8 = 0.2*x

8/0.2 = x = 40

x = 40

Q3) y is inversely proportional to x (y = k/x), and y = 8 when x = 30.

Then we get:

8 = k/30

Then the value of k is:

8*30 = k = 240

then the relationship is:

y = 240/x

a) we need to replace x by 4

y = 240/4 = 60

y = 60

b) we need to replace y by 360

360 = 240/x

360*x = 240

x = 240/360 = 0.666...

x = 0.666...

What is the volume of a cube with an edge length
of 2/3 foot?

Answers

Answer:

V= 512 inches or, 42.67 feet

Step-by-step explanation:

So a cube has the same length on all sides so you would multiply length times with times area or V = a^3

So, 2/3 foot is equal to 8 inches so you would do V = 8^3 which would get you the answer,

x^2+3x-24=
x
2
+3x−24=
\,\,3x+1
3x+1

Answers

Answer:

x=8 lol this is so easyndiewkkwwkwkwkw

Porqué el valor del coeficiente de la variable al cuadrado de una función cuadratica no puede ser cero?

Answers

Answer:

Ver respuesta abajo

Step-by-step explanation:

Una ecuación cuadrática es una ecuación que tiene la siguiente forma:

ax² + bx + c = 0

Donde:

a, b y c: coeficientes numéricos que acompañan a la incógnita.

Ahora bien, una función cuadrática es basicamente la misma ecuación cuadrática pero representada graficamente en un plano cartesiano.

Para que una ecuación o función sea cuadrática es absolutamente necesario y obligatorio que su expresión en forma de ecuación tenga el elemento "ax²", pues el "cuadrado" que es el exponente 2 que eleva la incógnita es lo que le da la característica de ecuación o función cuadrática.

Si el coeficiente que acompaña al x², es decir, el valor de a es cero, automaticamente pierde la condición de ser una función o ecuación cuadrática pues dicho término se hace cero su valor. En otras palabras, si x es un número cualquiera y está representado como incógnita, ¿qué sucede cuando multiplicas cualquier número por cero?, en este caso, el resultado es igual a cero:

Ejemplo:

0x² = 0 * x² = 0.

Por tanto, si el término cuadrático se hace cero, ya pierde la condición de cuadraticidad, y su gráfico no sería de forma parabólica, solo quedaría los términos bx + c, pero eso ya pertenece a una ecuación lineal o función afín.

Espero esto te sirva.

Please solve needed as soon as possible thank you I really appreciate it

Answers

Answer:

143

Step-by-step explanation:

Substitute n=3 into the problem

6([tex]3^{3}[/tex])-2([tex]3^{2}[/tex]) +3-4

Then figure out squared and power by 3

6(27)-2(9)+3-4

Next multiply

162-18+3-4

Finally, add and subtract

144+3=147

147-4=143

Construct a 95% confidence interval for the true difference in proportions of male and female smokers. Use p1^ for the proportion of men who smoke. Round your answers to three decimal places.

Answers

Answer:

ok?

Step-by-step explanation:

Which of the following are not polynomials?

Answers

Letter b and letter c

please help marking brainlist

Answers

Answer:

-3

Step-by-step explanation:

-9/3=-3

Answer:

-3

Step-by-step explanation:

-3 times 3 equals -9

what is 8 + g = 15? just need the answer

Answers

Step-by-step explanation:

8 + g = 15

g = 15 - 8

g = 7

Hope it will help :)

Answer: 7

Explanation: you do 15-8
That =7

For what value of x does f(x) = -3? *
.

Answers

Answer:

Step-by-step explanation:

Who is the president of Australia?

Answers

Answer:

Queen Elizabeth ll

Step-by-step explanation:

Australia's head of state is Queen Elizabeth II.

Tammy has a rectangular rug with an area of 21 square feet. The rug is 4 feet longer than it is wide. Which equations can be used to determine the length and the width of the rug

Answers

Answer:

21 = x( x+4)

Step-by-step explanation:

21 = x(x+4)

This equation is used because two sides are being multiplied by each other and the second one is four feet longer than the other one.

Para embaldosar un salon de 48 metros cubicos de area se han necesitado 375 tablas rectangulares en las cuales un lado medira 8 cm menos que el otro . Encuentra las dimensiones de las tablas.

Answers

I don’t speak Spanish

What is the answer to -3/7 ÷ 3/8 in simplest form?

Answers

Answer: -1 1/7

Explanation: Dividing two fractions is the same as multiplying the first fraction by the reciprocal (inverse) of the second fraction.

Take the reciprocal of the second fraction by flipping the numerator and denominator and changing the operation to multiplication. Then the equation becomes. This fraction can be reduced by dividing both the numerator and denominator by the Greatest Common Factor of 24 and 21 using 24÷321÷3=8/7. The fraction is the same as 8÷7. Therefore: 3/7÷3/8=1 1/7

Eugene can beat two levels every hour how many levels can he completed 3.5 hours

Answers

Answer:

~6.5 Levels

Step-by-step explanation:

2 levels every hour = 2:1

we take that ratio and multiply it by 3 for starters:

6 and half of our ratio

basically 6.5

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